absolute (optional) - If set to "true" will prefix the link target address with the value of the grails.serverURL property from Config, or http://localhost:<port> if no value in Config and not running in production.

base (optional) - Sets the prefix to be added to the link target address, typically an absolute server URL. This overrides the behaviour of the absolute property, if both are specified.

name (optional) - A value to use for both the name and id attribute of the form tag